Investigative journalists revealed in 2015 that ExxonMobil knew about climate change and its consequences as far back as the late 1970s. Supran said he and his co-authors wanted to apply some “statistical precision” to exactly what the company knew and when. “Cities can’t cope with the costs to both mitigate and adapt to or become more resilient to climate change. She noted the city pays about $50 million a year in repair costs associated with climate change. West Coast Environmental Law launched a “Sue Big Oil” campaign to encourage municipalities in British Columbia to launch lawsuits against major oil and gas companies, which prompted Vancouver’s potential fund.